CORRECTED-Banks update terms of $5.5 bln Worldpay buyout loan

(Corrects headline and text to say banks have updated the terms for the sale of loans, not launched the sale of loans)

Sept 18 (Reuters) - Banks have updated the terms for the sale of $5.5 billion of loans to finance private equity firm GTCR's acquisition of a majority stake in Worldpay, according to a term sheet seen by Reuters on Monday. (Reporting by Niket Nishant in Bengaluru; Editing by Nivedita Bhattacharjee)